Preservation of MJ-singularities under general residual intersections

Let AA be a nonsingular variety, let XAX\subset A be a closed subscheme, and let YY be a general tt-residual intersection of XX in the sense of the paper. The singularities MJ-canonical and MJ-log canonical are the Mather–Jacobian singularity conditions used for XX and YY. Residual-intersection conjecture. If XX is MJ-canonical (respectively, MJ-log canonical), then YY is MJ-canonical (respectively, MJ-log canonical). This predicts that the relevant MJ-singularities are preserved when passing to a general residual intersection.

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Primary source

Shihoko Ishii and Wenbo Niu, “A strongly geometric general residual intersection”, arXiv:1611.01581 (2018).

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